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生态学杂志 ›› 2021, Vol. 40 ›› Issue (3): 740-748.doi: 10.13292/j.1000-4890.202103.022

• 研究报告 • 上一篇    下一篇

伊犁特克斯河河岸带镰叶锦鸡儿灌丛分株结荚特征

韩大勇1,胡鹏飞2,张维1,柴永斌3,牛忠泽3,何琪1,阿尔曼艾·卡德尔别克1,牛毅飞1,彭娜娜1,苏尔娜·金宝1,杨允菲4*   

  1. (1伊犁师范大学生物与地理科学学院, 新疆伊宁 835000;  2昭苏特克斯河国家湿地公园, 新疆昭苏 835600;  3中国科学院新疆生态与地理研究所沙漠工程勘察设计所,  乌鲁木齐 830011;  4东北师范大学草地科学研究所, 植被生态科学教育部重点实验室, 长春 130024)
  • 出版日期:2021-03-10 发布日期:2021-03-15

Podding characteristics of Caragana aurantiaca shrub ramet in riparian zone of Tekes River, Yili.

HAN Da-yong1, HU Peng-fei2, ZHANG Wei1, CHAI Yong-bin3, NIU Zhong-ze3, HE Qi1, AERMANAI·Kadeerbieke1, NIU Yi-fei1, PENG Na-na1, SUERNA·Jinbao1, YANG Yun-fei4*   

  1. (1College of Biological and Geographical Science, Yili Normal University, Yining 835000, Xinjiang, China; 2Zhaosu Tekes River National Wetland Park, Zhaosu 835600, Xinjiang, China; 3Desert Engineering Survey and Design Institute, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 4Ministry of Education Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China).
  • Online:2021-03-10 Published:2021-03-15

摘要: 以伊犁特克斯河河岸带阶地和河漫滩两种生境镰叶锦鸡儿(Caragana aurantiaca)灌丛为对象,研究了结荚数量、重量、荚果大小与灌丛分株高度、分枝数量、丛径等指标的关系,探讨了荚果生产过程在种群更新中的作用。结果表明,阶地中的镰叶锦鸡儿荚果数量、荚果长度和荚果生物量显著高于河漫滩,而有性繁殖分配和单个荚果重显著低于河漫滩。荚果数量和荚果生物量大小分布特征较一致,均呈现L型分布格局,符合gamma分布,集中于0~20枚和0~0.5 g。单荚重在两个生境符合对数正态分布,集中于10~30 mg。两种生境荚果大小变异性主要由大个体引起。标准主轴回归分析表明,除河漫滩生境的荚果生物量与分株高的回归方程未达到显著水平之外,荚果数量、荚果重与分株高、分枝数、丛径的回归方程均达到显著水平。不论荚果数量还是荚果重,在两种生境中的斜率大小顺序均遵循分株高>丛径>分枝数的变化规律,其中分株高和丛径的斜率差异不明显,但均显著大于分枝数。两种生境镰叶锦鸡儿均可产生大量的荚果,在阶地中倾向于产生大量、小的荚果,河漫滩倾向于产生少、大的荚果,种群更新不存在种源限制,生产管理中应注意增加灌丛高度和丛径,提高结荚量,促进种群的自我更新和维持。

关键词: 繁殖对策, 大小不等性, 种群更新, 异速生长, 镰叶锦鸡儿, 伊犁河谷

Abstract: By surveying Caragana aurantiaca population in the riparian terrace and floodplain of Tekes River in Yili, we explored the relationships of number, weight and size of pods with vegetative ramet height, branch number and shrub diameter, and examined the roles of pod production in population regeneration. The results showed that the abundance, length, and biomass of C. aurantiacapods in the terrace were significantly higher than those in the floodplain, whereas both the sexual reproductive allocation and single pod weight were significantly lower than those in the floodplain. The distribution characteristics of the number and biomass of pod were consistent and the values were 0-20 and 0-0.5 g respectively, which showed Lshaped distribution patterns and complied with the gamma distribution. The weight of individual pod varied from 10-30 mg, showing a lognormal distribution. The large individuals largely contributed to the variations of pod sizes in both habitats. The results of standard major axis regression analysis showed that the regression between the pod biomass and ramet heights in floodplain habitat was not significant, whereas the regression between the pod numbers, pod biomass and ramet heights, branch numbers and shrub diameters were statistically significant. Irrelevant of the pod amount or pod biomass, their slopes in the two habitats showed an order of ramet height > shrub diameter > branch number. The slopes of ramet heights and shrub diameters were statistically insignificant, but were larger than that of branch numbers. Both habitats can grow a large number of pods. The terraces tended to produce the small pods with large amount, while the floodplain tended to produce large pods with small amount. The population regeneration processes were not constrained by seed source. We propose that conservation strategies should emphasize on the increases of height, diameter, and pods, which would help accelerate the self-regeneration and self-maintenance of this shrub species.

Key words: reproductive strategy, size inequality, population regeneration, allometric growth, Caragana aurantiaca, Yili River Valley.